Demos/Host/LowLevel/MIDIHost/MIDIHost.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2012.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2012  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \file
  32  *
  33  *  Main source file for the MIDIHost demo. This file contains the main tasks of
  34  *  the demo and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "MIDIHost.h"
  38
  39 /** Main program entry point. This routine configures the hardware required by the application, then
  40  *  enters a loop to run the application tasks in sequence.
  41  */
  42 int main(void)
  43 {
  44         SetupHardware();
  45
  46         puts_P(PSTR(ESC_FG_CYAN "MIDI Host Demo running.\r\n" ESC_FG_WHITE));
  47
  48         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  49         sei();
  50
  51         for (;;)
  52         {
  53                 MIDIHost_Task();
  54
  55                 USB_USBTask();
  56         }
  57 }
  58
  59 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  60 void SetupHardware(void)
  61 {
  62         /* Disable watchdog if enabled by bootloader/fuses */
  63         MCUSR &= ~(1 << WDRF);
  64         wdt_disable();
  65
  66         /* Disable clock division */
  67         clock_prescale_set(clock_div_1);
  68
  69         /* Hardware Initialization */
  70         Serial_Init(9600, false);
  71         LEDs_Init();
  72         Buttons_Init();
  73         Joystick_Init();
  74         USB_Init();
  75
  76         /* Create a stdio stream for the serial port for stdin and stdout */
  77         Serial_CreateStream(NULL);
  78 }
  79
  80 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
  81  *  starts the library USB task to begin the enumeration and USB management process.
  82  */
  83 void EVENT_USB_Host_DeviceAttached(void)
  84 {
  85         puts_P(PSTR(ESC_FG_GREEN "Device Attached.\r\n" ESC_FG_WHITE));
  86         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  87 }
  88
  89 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
  90  *  stops the library USB task management process.
  91  */
  92 void EVENT_USB_Host_DeviceUnattached(void)
  93 {
  94         puts_P(PSTR(ESC_FG_GREEN "\r\nDevice Unattached.\r\n" ESC_FG_WHITE));
  95         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  96 }
  97
  98 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
  99  *  enumerated by the host and is now ready to be used by the application.
 100  */
 101 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 102 {
 103         puts_P(PSTR("Getting Config Data.\r\n"));
 104
 105         uint8_t ErrorCode;
 106
 107         /* Get and process the configuration descriptor data */
 108         if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
 109         {
 110                 if (ErrorCode == ControlError)
 111                   puts_P(PSTR(ESC_FG_RED "Control Error (Get Configuration).\r\n"));
 112                 else
 113                   puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));
 114
 115                 printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 116
 117                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 118                 return;
 119         }
 120
 121         /* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */
 122         if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)
 123         {
 124                 printf_P(PSTR(ESC_FG_RED "Control Error (Set Configuration).\r\n"
 125                                          " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
 126
 127                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 128                 return;
 129         }
 130
 131         puts_P(PSTR("MIDI Device Enumerated.\r\n"));
 132         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 133 }
 134
 135 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 136 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 137 {
 138         USB_Disable();
 139
 140         printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
 141                                  " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
 142
 143         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 144         for(;;);
 145 }
 146
 147 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 148  *  enumerating an attached USB device.
 149  */
 150 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
 151                                             const uint8_t SubErrorCode)
 152 {
 153         printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
 154                                  " -- Error Code %d\r\n"
 155                                  " -- Sub Error Code %d\r\n"
 156                                  " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
 157
 158         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 159 }
 160
 161 /** Task to read in note on/off messages from the attached MIDI device and print it to the serial port.
 162  *  When the board joystick or buttons are pressed, note on/off messages are sent to the attached device.
 163  */
 164 void MIDIHost_Task(void)
 165 {
 166         if (USB_HostState != HOST_STATE_Configured)
 167           return;
 168
 169         Pipe_SelectPipe(MIDI_DATA_IN_PIPE);
 170
 171         if (Pipe_IsINReceived())
 172         {
 173                 MIDI_EventPacket_t MIDIEvent;
 174
 175                 Pipe_Read_Stream_LE(&MIDIEvent, sizeof(MIDIEvent), NULL);
 176
 177                 if (!(Pipe_BytesInPipe()))
 178                   Pipe_ClearIN();
 179
 180                 bool NoteOnEvent  = ((MIDIEvent.Command & 0x0F) == (MIDI_COMMAND_NOTE_ON  >> 4));
 181                 bool NoteOffEvent = ((MIDIEvent.Command & 0x0F) == (MIDI_COMMAND_NOTE_OFF >> 4));
 182
 183                 if (NoteOnEvent || NoteOffEvent)
 184                 {
 185                         printf_P(PSTR("MIDI Note %s - Channel %d, Pitch %d, Velocity %d\r\n"), NoteOnEvent ? "On" : "Off",
 186                                                                                                                                                                    ((MIDIEvent.Data1 & 0x0F) + 1),
 187                                                                                                                                                                    MIDIEvent.Data2, MIDIEvent.Data3);
 188                 }
 189         }
 190
 191         Pipe_SelectPipe(MIDI_DATA_OUT_PIPE);
 192
 193         if (Pipe_IsOUTReady())
 194         {
 195                 uint8_t MIDICommand = 0;
 196                 uint8_t MIDIPitch;
 197
 198                 static uint8_t PrevJoystickStatus;
 199                 uint8_t JoystickStatus  = Joystick_GetStatus();
 200                 uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
 201
 202                 /* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
 203                 uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
 204
 205                 if (JoystickChanges & JOY_LEFT)
 206                 {
 207                         MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 208                         MIDIPitch   = 0x3C;
 209                 }
 210
 211                 if (JoystickChanges & JOY_UP)
 212                 {
 213                         MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 214                         MIDIPitch   = 0x3D;
 215                 }
 216
 217                 if (JoystickChanges & JOY_RIGHT)
 218                 {
 219                         MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 220                         MIDIPitch   = 0x3E;
 221                 }
 222
 223                 if (JoystickChanges & JOY_DOWN)
 224                 {
 225                         MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 226                         MIDIPitch   = 0x3F;
 227                 }
 228
 229                 if (JoystickChanges & JOY_PRESS)
 230                 {
 231                         MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
 232                         MIDIPitch   = 0x3B;
 233                 }
 234
 235                 /* Check if a MIDI command is to be sent */
 236                 if (MIDICommand)
 237                 {
 238                         MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t)
 239                                 {
 240                                         .CableNumber = 0,
 241                                         .Command     = (MIDICommand >> 4),
 242
 243                                         .Data1       = MIDICommand | Channel,
 244                                         .Data2       = MIDIPitch,
 245                                         .Data3       = MIDI_STANDARD_VELOCITY,
 246                                 };
 247
 248                         /* Write the MIDI event packet to the pipe */
 249                         Pipe_Write_Stream_LE(&MIDIEvent, sizeof(MIDIEvent), NULL);
 250
 251                         /* Send the data in the pipe to the device */
 252                         Pipe_ClearOUT();
 253                 }
 254
 255                 /* Save previous joystick value for next joystick change detection */
 256                 PrevJoystickStatus = JoystickStatus;
 257         }
 258 }
 259